Pumps – One fluid pumped by contact or entrainment with another – Liquid pumped by supplying or exhausting gaseous motive...
Reexamination Certificate
2008-01-08
2008-01-08
Kramer, Devon C. (Department: 3746)
Pumps
One fluid pumped by contact or entrainment with another
Liquid pumped by supplying or exhausting gaseous motive...
C417S118000
Reexamination Certificate
active
10762291
ABSTRACT:
An automatic, pneumatic pump having a chamber that is gravity fed through a top opening and through a vertical tube with waste liquid. A buoyant plunger sits on an air inlet nipple, which nipple is located at the bottom of the chamber. Liquid entering the chamber causes the plunger to float and thereby to be unseated from the air inlet nipple. The plunger rises in the tube until it closes the top opening. Pressurized air enters the chamber and forces the waste liquid out through a discharge line. When all air and liquid have been discharged, the plunger falls to the bottom of the tube and reseats on the air inlet nipple so that the cycle can start again.
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Bertheaud Peter J
Kramer Devon C.
Litman Richard C.
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